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向光性

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Light output analysis tests character of spectrum radiate of pyrotechnic mixtures and analyses wave band distribute of light by comparing different static blaze spectrograms of the pyrotechnic mixtures. Screen out the better pyrotechnic mixtures according to request of pumping source. Press experiments in airtight erupt container experiment, which simulate the circumstance that pyrotechnic mixtures deflagrate in quartz pipe, realize the press influence to the quartz pipe wall and the disciplinarian of axes press variety. Apply these pyrotechnic mixtures to Nd:YAG lasers as the pumping source and compare pumping efficiency of different pyrotechnic mixtures. Pumping efficiency is an important standard which checkout if these pyrotechnic mixtures are the better pumping source. Sensitivity experiment analysis incarnate security of pyrotechnic mixtures that is the essential parameter in the process of design, manufacture and use.

通过对烟火药的热分析(爆热分析、DTA、TG),了解备选烟火药反应过程中的能量输出特性及反应过程中的物理、化学变化规律;光输出分析实验对烟火药配方光谱辐射特征进行测试,比较其静态火焰光谱图,分析不同烟火药剂光辐射波段分布特征,根据激光泵浦源的辐射要求,进而筛选更符合激光泵浦源药剂要求的烟火药;模拟烟火药在石英管中爆燃环境的密闭爆发器压力分析实验反映了烟火药在石英管中反应时对管壁的压力影响以及管内轴向压力变化规律;将烟火药作为泵浦源应用于Nd:YAG固体激光器,比较不同烟火药的泵浦效率,作为检验烟火药是否适合作为激光泵浦源的重要标准;感度实验分析体现了各种烟火药的安全性,是烟火药设计、制造和使用的必要示性数。

In order to study the nonuniform temperature rise and thermal effect in the Yb:YAG crystal,based on the theory of semi-analytical thermal analysis and working characteristic analysis of Yb:YAG microchip with super-Gaussian beam end-pumping and back-face cooling,a new solution of heat conduction equation was introduced and the general expressions of temperature field,thermal distortion field and additional optical path differences of Yb:YAG microchip were obtained respectively.

为了研究抽运光在Yb:YAG晶体内产生的非均匀性温升以及引起的热效应问题,以半解析热分析理论为基础,结合超高斯光束端面抽运、背向冷却Yb:YAG微片工作特点分析,采用热传导方程一种新的求解方法,得出了Yb:YAG微片内部温度场、热形变场、附加光程差的半解析计算表达式。

In my study, we use a 4F acoustic lens which f-number is 1.3 to set up a photoacoustic imaging system. With same axial and lateral magnification, 3D photoacoustic imaging system with 4F acoustic lens can detect photoacoustic signal distribution on object plane in real-time, and get the different axial distance signal to show the 3D photoacoustic image by different signal receiving time.

本研究采用相对孔径为1.3的4F声透镜,设计三维光声影像系统,利用4F声透镜景深范围内之轴向与横向放大倍率相等,即时性的重现物平面所发出的同调性光声讯号分布,并利用不同的接收时间来呈现不同深度距离的讯号成像,取得物平面上受测物的三维光声影像。

This thesis demonstrates the pre-polymers in a polymer-dispersed cholesteric liquid crystals can be polymerized into a polymer film, which can eliminate the aligning capability of the homogeneous alignment layer. Thereafter, the textures of the cholesteric liquid crystals in UV-cured region can be changed from reflective planar texture to the scattered focal conic one. Additionally, the clearing temperature of the liquid crystals can be reduced by doping with chiral dopant or monomers. The cause is the increase of the impurity concentration in LCs. In other words, if the monomers are polymerized, the clearing temperature of LCs in that region should increase due to the decrease of the impurity concentration. Therefore, impurities associated with doping with monomeric and chiral dopants cause the clearing temperature of LCs in cured region to differ from that in uncured region.

本文中,我们提出在高分子聚合物薄膜之胆固醇液晶(polymer-dispersed cholesteric liquid crystals,简称PDCLCs)中,利用紫外光使PDCLC中的单体聚合成薄膜,此即为光引致聚合反应,而该薄膜将原本在表面所作的配向膜覆盖且破坏其配向能力,使胆固醇液晶由原本反射的planar结构转换成散射的focal conic结构;另外,有关液晶材料的相变温度会由於掺杂手性分子或单体而降低,此因液晶材料内『杂质』浓度增加,而造成的液晶材料之不纯度增加,最终导致相变温度降低,若搭配上述光引致聚合反应,则由於光照区之单体聚合,使该区域单体占总材料之比例下降,即不纯度降低,进而使液晶材料之相变温度上升,该区域之相变温度与未照光区有所不同。

Photonasty A nastic movement in response to light.

感光性:响应光刺激的向性运动。

The forward and reverse movement of the polishing pad provides superior planarity and uniformity to the surface of the wafer.

抛光垫(6)的前向与换向运动给晶片(18)表面提供了优越的平面性与均匀性。

We used ITO glass substrate and high purity(99.99%) titanium , put to use sputtering process, add to high purity O2 make it complete the best structure film and the thickness about 1400 . By way of 500℃ anneal could got a better anatase phase, this result could easy reaction with electrolyte to increase electron-transferred. Used as spin casting covering PR on ITO substrate, transferring patterns of array circular shapes on a mask to photography, used optimize temperature and time to hard bake. Finally used HCl to etching underexposed TiO2 area, and acetone to tripper top PR, make it to accomplish pillars shape TiO2 electrode.

本研究使用ITO玻璃基板为底材在以高纯度钛(99.99%)为靶材,利用溅镀方式通入纯氧使其行成高纯度TiO2镀於ITO基板上行成厚度约1400的薄膜,且经500℃高温烧结使其行成最强的锐钛矿结晶相,此晶相有利於与电解液反应进而增加电子的转移,提升太阳能电池最佳的效率,在以旋转涂布方式铺上光阻,以矩阵排列的圆孔光罩曝光、最佳的温度及时间来烘烤、显影后;使用盐酸以等向性湿蚀刻方式蚀刻未曝光之TiO2区域,最后利用鈵铜将最上层光阻去除,使其行成柱状TiO2的电极。

The tryptophan residues play important roles in DNA photoreactivation catalyzed by CPD photolyases. We have investigated the action mechanism concerning Trp in DNA photoreactivation, and obtained the results as follows: 1 We proposed a mechanism of photosensitized splitting of CPDs by Trp and Trp-containing peptides. 2 Quantum yields of splitting of the model compounds that a Trp linked covalently a CPD were obtained under 290 nm light in various solvents, these values changing with solvent, range from 0.01 to 0.5. 3 Utilizing pulse radiolysis technique, splitting processes were observed in aqueous solution of the CPDs with hydrated electron and some oxidative species (such as hydroxyl radical, bromic radical and azide radical), and obtained their rate constants. In the case of interaction between CPD and hydrated electron, splitting of the CPD anion, and pyrimidine anion transfer an electron to FAD or Rf, were observed. The process rate was slower one order more than that in photolyase. Minor, but highly mutagenic UV-light-induced lesions are (6-4) photoproducts, which are repaired by (6-4) photolyases. These enzymes, discovered in 1993, are not well characterized and their mechanism is still under investigation.

我们研究它的作用机理,获得以下结果:1)建立了色氨酸及其肽对嘧啶二聚体光敏化裂解的直接修复作用机理模型;2)获得了色氨酸共价键连接于嘧啶二聚体的化合物在多种溶剂中290nm光辐照裂解的量子效率,其值随溶剂而变化,范围在0.01-0.5;3)运用脉冲辐解观察到嘧啶二聚体与水合电子和一些氧化性的自由基作用裂解过程,得到相应速率常数;对二聚体与水合电子作用发生裂解以及向FAD返还电子的过程进行了体外模拟;4)(6-4)光解酶的作用机理中一个关键假定是氧杂环丁烷中间体在接受电子后能自发裂解,恢复二嘧啶的结构。

In ACC, NGF,TrkA and p75 mainly existed in cells of duct-like, cribriform and mass-like structures.According to the optical density scanning of immunohistochemistric stain of NGF and TrkA in salivary gland and tumor tissues and quantification analysis, it was shown that the average optical density of NGF and TrkA increased in order of salivary gland tissues around neoplasm, mucoepidermiod carcinoma, and adenoid cystic carcinoma.

2叫 吉林大学硕士学位论文通过对NGF和TrkA在涎腺组织和涎腺肿瘤中的免疫组织化学染色结果进行光密度扫描,对所测平均光密度定量分析,结果显示:NGF和TrkA平均光密度值按照肿瘤周围涎腺组织、豁液表皮样癌和腺样囊性癌依次升高,统计学分析在各组间均有极显著差异(P.01),表明NGF和TrkA通过自分泌机制调控涎腺腺样囊性癌和豁液表皮样癌的生长与增殖,通过旁分泌机制参与涎腺腺样囊性癌向神经周围的浸润。

According to electrooptical properties of nematic liquid crystal , two types of liquid crystal are used as scattering materials to carry out the experimental study of the partial coherence light source designed for EFISI.

利用向列液晶的电光特性,选用两种液晶盒作为散射体,完成了液晶散射法产生部分相干源的原理性实验,得出液晶散射光能量透过率、均匀性及相干性与外加电场的关系。

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推荐网络例句

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称;三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起,称之为挽歌体诗人或者史诗诗人,他们被称为诗人,似乎只是因为遵守格律写作,而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。

This is not paper type of business,it's people business,with such huge money involved.

这不是纸上谈兵式的交易,这是人与人的业务,而且涉及金额巨大。